A crossword without clues: instead you are given every number that goes in the grid, sorted by length. Each number fits exactly one space, and where an across number crosses a down number they must share the digit.
Start where there is little choice — a length with only one or two numbers, or a space with a given digit — and the crossings do the rest. Every puzzle here has exactly one answer.
Beginner puzzles use 3-digit numbers with several already in place; Genius mixes 3 to 7 digits with almost nothing given.
Place every number from the list in the grid so the digits match wherever across and down numbers cross.
The full guide, with a worked example and common mistakes: How to play Number Crossword.
Yes — every puzzle is checked, and given digits are added only where needed to make the answer unique.
In Cross Numbers each answer comes from a maths clue. Here you get the list of numbers and must work out where they go.
Open the Number Crossword Solver, draw the grid, type the numbers and press Solve.